The freeze-thaw cycle effect on blood serum autofluorescence, Raman spectroscopy and SERS: implications for sample classification and disease diagnostics.

The issue of variability introduced into blood plasma and serum analysis by preanalytical procedures is the major obstacle to obtaining accurate and reproducible results. While the question of how to overcome this issue has been discussed in biochemical detection of analytes and omics technologies, its relevance to the field of optical spectroscopy remains mostly unexplored. In this work, we evaluated the freeze-thaw cycle (FTC)-induced alternations in blood serum optical properties by means of autofluorescence and Raman spectroscopy, including surface-enhanced Raman spectroscopy (SERS).

Development of the process of determining essential hazardous psychosocial factors of employee stress risk.

The purpose of the study is to determine the impact of hazardous psychosocial factors on stress among employees when performing production tasks to develop recommendations for reducing their impact. Based on the recommendations of the ISO 45003:2021 standard, a special questionnaire was developed to determine hazardous psychosocial factors that lead to the appearance of worker's stress, the answers to which were evaluated on a Likert scale with points from 0 to 4. 68 workers (23 men and 45 women) aged 20 to 45 took part in the survey conducted at industrial enterprises of the Dnipro region in May-June 2023.

[Parameters of nocturnal penile tumescence monitoring as potential predictors of the coronary heart disease].

Aim: To determine the possibilities of nocturnal penile tumescence (NPT) monitoring in the detection of coronary heart disease (CHD).

Materials And Methods: A total of 100 patients were included in the study, of them 50 men had a confirmed diagnosis of CHD and 50 patients consisted the control group. In all patients, flow-dependent vasodilation of the brachial artery and pulse wave velocity were evaluated.